diff --git a/src/main/libs/clients/PostgreSQLClient.js b/src/main/libs/clients/PostgreSQLClient.js
index 7136a865..87b95672 100644
--- a/src/main/libs/clients/PostgreSQLClient.js
+++ b/src/main/libs/clients/PostgreSQLClient.js
@@ -727,7 +727,7 @@ export class PostgreSQLClient extends AntaresCore {
 
          const results = await this.raw(sql);
 
-         const parameters = results.rows.map(row => {
+         const parameters = results.rows.filter(row => row.parameter_mode).map(row => {
             return {
                name: row.parameter_name,
                type: row.data_type.toUpperCase(),
@@ -746,7 +746,7 @@ export class PostgreSQLClient extends AntaresCore {
             deterministic: null,
             dataAccess: null,
             language: row.pg_get_functiondef.match(/(?<=LANGUAGE )(.*)(?<=[\S+\n\r\s])/gm)[0],
-            returns: row.pg_get_functiondef.match(/(?<=RETURNS SETOF )(.*)(?<=[\S+\n\r\s])/gm)[0].toUpperCase()
+            returns: row.pg_get_functiondef.match(/(?<=RETURNS )(.*)(?<=[\S+\n\r\s])/gm)[0].replace('SETOF ', '').toUpperCase()
          };
       })[0];
    }
@@ -758,7 +758,7 @@ export class PostgreSQLClient extends AntaresCore {
     * @memberof PostgreSQLClient
     */
    async dropFunction (params) {
-      const sql = `DROP FUNCTION \`${params.func}\``;
+      const sql = `DROP FUNCTION ${this._schema}.${params.func}`;
       return await this.raw(sql);
    }
 
@@ -791,18 +791,23 @@ export class PostgreSQLClient extends AntaresCore {
     * @memberof PostgreSQLClient
     */
    async createFunction (func) {
-      const parameters = func.parameters.reduce((acc, curr) => {
-         acc.push(`\`${curr.name}\` ${curr.type}${curr.length ? `(${curr.length})` : ''}`);
-         return acc;
-      }, []).join(',');
+      const parameters = 'parameters' in func
+         ? func.parameters.reduce((acc, curr) => {
+            acc.push(`${curr.context} ${curr.name} ${curr.type}${curr.length ? `(${curr.length})` : ''}`);
+            return acc;
+         }, []).join(',')
+         : '';
 
-      const sql = `CREATE ${func.definer ? `DEFINER=${func.definer} ` : ''}FUNCTION \`${func.name}\`(${parameters}) RETURNS ${func.returns}${func.returnsLength ? `(${func.returnsLength})` : ''}
+      if (this._schema !== 'public')
+         this.use(this._schema);
+
+      const body = func.returns ? func.sql : '$BODY$\n$BODY$';
+
+      const sql = `CREATE FUNCTION ${this._schema}.${func.name}(${parameters})
+         RETURNS ${func.returns || 'void'}
          LANGUAGE ${func.language}
-         ${func.deterministic ? 'DETERMINISTIC' : 'NOT DETERMINISTIC'}
-         ${func.dataAccess}
-         SQL SECURITY ${func.security}
-         COMMENT '${func.comment}'
-         ${func.sql}`;
+         SECURITY ${func.security}
+         AS ${body}`;
 
       return await this.raw(sql, { split: false });
    }
diff --git a/src/renderer/components/ModalAskParameters.vue b/src/renderer/components/ModalAskParameters.vue
index ed4e795c..05e779f8 100644
--- a/src/renderer/components/ModalAskParameters.vue
+++ b/src/renderer/components/ModalAskParameters.vue
@@ -15,7 +15,7 @@
          <div class="content">
             <form class="form-horizontal">
                <div
-                  v-for="(parameter, i) in localRoutine.parameters"
+                  v-for="(parameter, i) in inParameters"
                   :key="parameter._id"
                   class="form-group"
                >
@@ -66,6 +66,11 @@ export default {
          values: {}
       };
    },
+   computed: {
+      inParameters () {
+         return this.localRoutine.parameters.filter(param => param.context === 'IN');
+      }
+   },
    created () {
       window.addEventListener('keydown', this.onKey);
 
diff --git a/src/renderer/components/ModalNewFunction.vue b/src/renderer/components/ModalNewFunction.vue
index 6d9494ab..4c319923 100644
--- a/src/renderer/components/ModalNewFunction.vue
+++ b/src/renderer/components/ModalNewFunction.vue
@@ -7,7 +7,7 @@
    >
       <template :slot="'header'">
          <div class="d-flex">
-            <i class="mdi mdi-24px mdi-plus mr-1" /> {{ $t('message.createNewRoutine') }}
+            <i class="mdi mdi-24px mdi-plus mr-1" /> {{ $t('message.createNewFunction') }}
          </div>
       </template>
       <div :slot="'body'">
@@ -25,7 +25,19 @@
                   >
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.languages" class="form-group">
+               <label class="form-label col-4">
+                  {{ $t('word.language') }}
+               </label>
+               <div class="column">
+                  <select v-model="localFunction.language" class="form-select">
+                     <option v-for="language in customizations.languages" :key="language">
+                        {{ language }}
+                     </option>
+                  </select>
+               </div>
+            </div>
+            <div v-if="customizations.definer" class="form-group">
                <label class="form-label col-4">
                   {{ $t('word.definer') }}
                </label>
@@ -53,42 +65,7 @@
                   </select>
                </div>
             </div>
-            <div class="form-group">
-               <label class="form-label col-4">
-                  {{ $t('word.returns') }}
-               </label>
-               <div class="column">
-                  <div class="input-group">
-                     <select
-                        v-model="localFunction.returns"
-                        class="form-select text-uppercase"
-                        style="width: 0;"
-                     >
-                        <optgroup
-                           v-for="group in workspace.dataTypes"
-                           :key="group.group"
-                           :label="group.group"
-                        >
-                           <option
-                              v-for="type in group.types"
-                              :key="type.name"
-                              :selected="localFunction.returns === type.name"
-                              :value="type.name"
-                           >
-                              {{ type.name }}
-                           </option>
-                        </optgroup>
-                     </select>
-                     <input
-                        v-model="localFunction.returnsLength"
-                        class="form-input"
-                        type="number"
-                        min="0"
-                     >
-                  </div>
-               </div>
-            </div>
-            <div class="form-group">
+            <div v-if="customizations.comment" class="form-group">
                <label class="form-label col-4">
                   {{ $t('word.comment') }}
                </label>
@@ -111,7 +88,7 @@
                   </select>
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.functionDataAccess" class="form-group">
                <label class="form-label col-4">
                   {{ $t('message.dataAccess') }}
                </label>
@@ -124,7 +101,7 @@
                   </select>
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.functionDeterministic" class="form-group">
                <div class="col-4" />
                <div class="column">
                   <label class="form-checkbox form-inline">
@@ -152,11 +129,12 @@ export default {
       return {
          localFunction: {
             definer: '',
-            sql: 'BEGIN\r\n    RETURN NULL;\r\nEND',
+            sql: '',
             parameters: [],
             name: '',
             comment: '',
-            returns: 'INT',
+            language: null,
+            returns: null,
             returnsLength: 10,
             security: 'DEFINER',
             deterministic: false,
@@ -168,9 +146,17 @@ export default {
    computed: {
       schema () {
          return this.workspace.breadcrumbs.schema;
+      },
+      customizations () {
+         return this.workspace.customizations;
       }
    },
    mounted () {
+      if (this.customizations.languages)
+         this.localFunction.language = this.customizations.languages[0];
+
+      if (this.customizations.procedureSql)
+         this.localFunction.sql = this.customizations.procedureSql;
       setTimeout(() => {
          this.$refs.firstInput.focus();
       }, 20);
diff --git a/src/renderer/components/ModalNewRoutine.vue b/src/renderer/components/ModalNewRoutine.vue
index bb19bcbd..4929c15d 100644
--- a/src/renderer/components/ModalNewRoutine.vue
+++ b/src/renderer/components/ModalNewRoutine.vue
@@ -25,6 +25,18 @@
                   >
                </div>
             </div>
+            <div v-if="customizations.languages" class="form-group">
+               <label class="form-label col-4">
+                  {{ $t('word.language') }}
+               </label>
+               <div class="column">
+                  <select v-model="localRoutine.language" class="form-select">
+                     <option v-for="language in customizations.languages" :key="language">
+                        {{ language }}
+                     </option>
+                  </select>
+               </div>
+            </div>
             <div v-if="customizations.definer" class="form-group">
                <label class="form-label col-4">
                   {{ $t('word.definer') }}
@@ -121,6 +133,7 @@ export default {
             parameters: [],
             name: '',
             comment: '',
+            language: null,
             security: 'DEFINER',
             deterministic: false,
             dataAccess: 'CONTAINS SQL'
@@ -137,6 +150,9 @@ export default {
       }
    },
    mounted () {
+      if (this.customizations.languages)
+         this.localRoutine.language = this.customizations.languages[0];
+
       if (this.customizations.procedureSql)
          this.localRoutine.sql = this.customizations.procedureSql;
       setTimeout(() => {
diff --git a/src/renderer/components/WorkspaceExploreBarMiscContext.vue b/src/renderer/components/WorkspaceExploreBarMiscContext.vue
index c2121d00..22d6797f 100644
--- a/src/renderer/components/WorkspaceExploreBarMiscContext.vue
+++ b/src/renderer/components/WorkspaceExploreBarMiscContext.vue
@@ -248,9 +248,11 @@ export default {
          switch (this.workspace.client) { // TODO: move in a better place
             case 'maria':
             case 'mysql':
-            case 'pg':
                sql = `SELECT \`${this.localElement.name}\` (${params.join(',')})`;
                break;
+            case 'pg':
+               sql = `SELECT ${this.localElement.name}(${params.join(',')})`;
+               break;
             case 'mssql':
                sql = `SELECT ${this.localElement.name} ${params.join(',')}`;
                break;
diff --git a/src/renderer/components/WorkspacePropsFunctionOptionsModal.vue b/src/renderer/components/WorkspacePropsFunctionOptionsModal.vue
index b6e889d7..61591657 100644
--- a/src/renderer/components/WorkspacePropsFunctionOptionsModal.vue
+++ b/src/renderer/components/WorkspacePropsFunctionOptionsModal.vue
@@ -26,7 +26,19 @@
                   >
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.languages" class="form-group">
+               <label class="form-label col-4">
+                  {{ $t('word.language') }}
+               </label>
+               <div class="column">
+                  <select v-model="optionsProxy.language" class="form-select">
+                     <option v-for="language in customizations.languages" :key="language">
+                        {{ language }}
+                     </option>
+                  </select>
+               </div>
+            </div>
+            <div v-if="customizations.definer" class="form-group">
                <label class="form-label col-4">
                   {{ $t('word.definer') }}
                </label>
@@ -81,6 +93,7 @@
                         </optgroup>
                      </select>
                      <input
+                        v-if="customizations.parametersLength"
                         v-model="optionsProxy.returnsLength"
                         class="form-input"
                         type="number"
@@ -89,7 +102,7 @@
                   </div>
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.comment" class="form-group">
                <label class="form-label col-4">
                   {{ $t('word.comment') }}
                </label>
@@ -112,7 +125,7 @@
                   </select>
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.functionDataAccess" class="form-group">
                <label class="form-label col-4">
                   {{ $t('message.dataAccess') }}
                </label>
@@ -125,7 +138,7 @@
                   </select>
                </div>
             </div>
-            <div class="form-group">
+            <div v-if="customizations.functionDeterministic" class="form-group">
                <div class="col-4" />
                <div class="column">
                   <label class="form-checkbox form-inline">
@@ -159,6 +172,9 @@ export default {
    computed: {
       isTableNameValid () {
          return this.optionsProxy.name !== '';
+      },
+      customizations () {
+         return this.workspace.customizations;
       }
    },
    created () {
diff --git a/src/renderer/components/WorkspacePropsFunctionParamsModal.vue b/src/renderer/components/WorkspacePropsFunctionParamsModal.vue
index 5a11444d..4ed0079e 100644
--- a/src/renderer/components/WorkspacePropsFunctionParamsModal.vue
+++ b/src/renderer/components/WorkspacePropsFunctionParamsModal.vue
@@ -49,7 +49,7 @@
                            <div class="tile-title">
                               {{ param.name }}
                            </div>
-                           <small class="tile-subtitle text-gray">{{ param.type }}{{ param.length ? `(${param.length})` : '' }}</small>
+                           <small class="tile-subtitle text-gray">{{ param.type }}{{ param.length ? `(${param.length})` : '' }} · {{ param.context }}</small>
                         </div>
                         <div class="tile-action">
                            <button
@@ -106,7 +106,7 @@
                         </select>
                      </div>
                   </div>
-                  <div class="form-group">
+                  <div v-if="customizations.parametersLength" class="form-group">
                      <label class="form-label col-3">
                         {{ $t('word.length') }}
                      </label>
@@ -119,6 +119,37 @@
                         >
                      </div>
                   </div>
+                  <div v-if="customizations.functionContext" class="form-group">
+                     <label class="form-label col-3">
+                        {{ $t('word.context') }}
+                     </label>
+                     <div class="column">
+                        <label class="form-radio">
+                           <input
+                              v-model="selectedParamObj.context"
+                              type="radio"
+                              name="context"
+                              value="IN"
+                           > <i class="form-icon" /> IN
+                        </label>
+                        <label class="form-radio">
+                           <input
+                              v-model="selectedParamObj.context"
+                              type="radio"
+                              value="OUT"
+                              name="context"
+                           > <i class="form-icon" /> OUT
+                        </label>
+                        <label class="form-radio">
+                           <input
+                              v-model="selectedParamObj.context"
+                              type="radio"
+                              value="INOUT"
+                              name="context"
+                           > <i class="form-icon" /> INOUT
+                        </label>
+                     </div>
+                  </div>
                </form>
                <div v-if="!parametersProxy.length" class="empty">
                   <div class="empty-icon">
@@ -168,6 +199,9 @@ export default {
       },
       isChanged () {
          return JSON.stringify(this.localParameters) !== JSON.stringify(this.parametersProxy);
+      },
+      customizations () {
+         return this.workspace.customizations;
       }
    },
    mounted () {
diff --git a/src/renderer/components/WorkspacePropsTabFunction.vue b/src/renderer/components/WorkspacePropsTabFunction.vue
index 044e26b0..380c1c37 100644
--- a/src/renderer/components/WorkspacePropsTabFunction.vue
+++ b/src/renderer/components/WorkspacePropsTabFunction.vue
@@ -281,9 +281,11 @@ export default {
          switch (this.connection.client) { // TODO: move in a better place
             case 'maria':
             case 'mysql':
-            case 'pg':
                sql = `SELECT \`${this.originalFunction.name}\` (${params.join(',')})`;
                break;
+            case 'pg':
+               sql = `SELECT ${this.originalFunction.name}(${params.join(',')})`;
+               break;
             case 'mssql':
                sql = `SELECT ${this.originalFunction.name} ${params.join(',')}`;
                break;