Setting a NULL Indicator

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If a parameter or select-list item contains a NULL value, the sqlind field should be used to indicate its NULL status. Appropriate storage space must be allocated for sqlind before values can be stored there.

Before insertion, set sqlind to –1 to indicate that NULL values are legal. Otherwise, set sqlind to 0.

After selection, a sqlind of –1 indicates a field contains a NULL value. Other values indicate a field contains non-NULL data.